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|
#!/bin/sh
log_lines() {
if [ "$SHOW_TIMESTAMPS" -eq 1 ]; then
regex_start='\[\([^]]*\)\] '
replacement='\1 \3'
else
regex_start='.*'
replacement='\2'
fi
if [ "$SHOW_INSTALLED" -eq 1 ]; then
regex_end='\(starting full system upgrade\|upgraded.*\|installed.*\)'
else
regex_end='\(starting full system upgrade\|upgraded.*\)'
fi
regex='^'"$regex_start"'\[\(PACMAN\|ALPM\)\] '"$regex_end"'$'
sed "/$regex/!d; s//$replacement/" "$PACMAN_LOG"
}
mark_lines() {
n=1
while read -r line; do
case "$line" in
*starting\ full\ system\ upgrade*)
printf "%i " "$n"
n=$((n + 1))
;;
esac
printf "%s\n" "$line"
done
}
: "${PACMAN_LOG:=/var/log/pacman.log}"
: "${SHOW_INSTALLED:=0}"
: "${SHOW_TIMESTAMPS:=0}"
while [ -n "$1" ]; do
case "$1" in
-i | --installed) SHOW_INSTALLED=1 ;;
-t | --timestamps) SHOW_TIMESTAMPS=1 ;;
-l | --log)
shift
PACMAN_LOG="$1"
;;
*) break ;;
esac
shift
done
n_start=${1:-1}
n_max=$(grep -cF ' starting full system upgrade' "$PACMAN_LOG")
# Print whole log if we've asked to start too far
[ "$n_max" -lt "$n_start" ] && n_start=$n_max
end='$' # EOF
if [ -n "$2" ]; then
n_stop=$2
if [ "$n_start" -le "$n_stop" ] || [ "$n_max" -lt "$n_stop" ]; then
# Empty or negative range, or non-intersecting with available log.
exit
fi
end="/^\($n_stop\) .*\(starting.*\)$/"
fi
log_lines | tac | mark_lines | tac |
sed "
/^\($n_start\) .*\(starting.*\)$/,$end !d;
s//\1 \2/;
"
|
